I have saved data from pg_stat_bgwriter view following Greg Smith's advice from his book: select now(),* from pg_stat_bgwriter; and then aggregated the data with query from his book as well. checkpoint segments was first 30 and next day I have increased it to 200, and results has changed: <http://postgresql.1045698.n5.nabble.com/file/n5824026/Auswahl_235.png> now percent of checkpoints required because of number of segments is bigger and backend writer share is also too high- I assume it's not what should happen. I'm not sure how to interpret correlation between allocation and written data? The bigger amount of data written per sec is a good sign? -- View this message in context: http://postgresql.1045698.n5.nabble.com/Checkpoints-tuning-tp5824026.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
